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utils_test.go
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/
utils_test.go
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package ytdl
import (
"math/rand"
"strings"
"testing"
)
const letterBytes = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
const (
letterIdxBits = 6 // 6 bits to represent a letter index
letterIdxMask = 1<<letterIdxBits - 1 // All 1-bits, as many as letterIdxBits
)
func randString(n int) string {
b := make([]byte, n)
for i := 0; i < n; {
if idx := int(rand.Int63() & letterIdxMask); idx < len(letterBytes) {
b[i] = letterBytes[idx]
i++
}
}
return string(b)
}
func TestReverseString(t *testing.T) {
strs, reverseStrs := make([]string, 20), make([]string, 20)
for i := 0; i < len(strs); i++ {
strs[i] = randString(rand.Intn(50))
s := strings.Split(strs[i], "")
reverseStringSlice(s)
reverseStrs[i] = strings.Join(s, "")
}
for i, s := range strs {
rs := reverseStrs[i]
for j, c := range s {
if c != rune(rs[len(rs)-1-j]) {
t.Fail()
}
}
}
}
func TestInterfaceToString(t *testing.T) {
values := map[interface{}]string{
8: "8",
int64(16): "16",
"hello": "hello",
0.01: "0.01",
}
for k, v := range values {
if interfaceToString(k) != v {
t.Error("Value:", v, " != ", v)
}
}
}